AD586JN ,High Precision 5 V ReferenceSPECIFICATIONSA INAD586J AD586K/A AD586L/B AD586M AD586S AD586TModel Min Typ Max Min Typ Max Min Ty ..
AD586JQ ,High Precision 5 V Referencespecifications.the standard on-chip references.The AD586J, K, L and M are specified for operation f ..
AD586JQ/+ ,High Precision 5 V Referenceapplications.Edges: A diamond saw is used to separate wafers into dice thus providing perpendicular ..
AD586JR ,High Precision 5 V ReferenceSpecifications in boldface are rested on all production units at final electrical test. Results fro ..
AD586K ,High Precision 5 V ReferenceSPECIFICATIONSA INAD586J AD586K/A AD586L/B AD586M AD586S AD586TModel Min Typ Max Min Typ Max Min Ty ..
AD586KN ,High Precision 5 V ReferenceSPECIFICATIONSA INAD586J AD586K/A AD586L/B AD586M AD586S AD586TModel Min Typ Max Min Typ Max Min Ty ..
AD9816 ,Complete 12-Bit 6 MSPS CCD/CIS Signal ProcessorSPECIFICATIONS (T to T with AVDD = +5.0 V, DVDD = +5.0 V, DRVDD = +5.0 V, CDS Mode, f = 6 MHz,MIN M ..
AD9816JS ,Complete 12-Bit 6 MSPS CCD/CIS Signal ProcessorSPECIFICATIONS (T to T with AVDD = +5.0 V, DVDD = +5.0 V, DRVDD = +5.0 V, CDS Mode, f = 6 MHz,MIN M ..
AD9821KSTRL ,12-Bit 40 MSPS Imaging Signal ProcessorAPPLICATIONSment, black level adjustment, and power-down modes.Digital Still Cameras Using CMOS Ima ..
AD9822JR ,Complete 14-Bit CCD/CIS Signal ProcessorSPECIFICATIONS C = 10 pF, unless otherwise noted.)LParameter Symbol Min Typ Max UnitLOGIC INPUTSHig ..
AD9822JRS ,Complete 14-Bit CCD/CIS Signal ProcessorSPECIFICATIONS Gain = 1, unless otherwise noted.)Parameter Min Typ Max UnitMAXIMUM CONVERSION RATE3 ..
AD9822JRSRL ,Complete 14-Bit CCD/CIS Signal ProcessorAPPLICATIONSconsumes 385 mW of power, and is packaged in a 28-lead SOICFlatbed Document Scannersor ..
AD586AR-AD586BR-AD586J-AD586JN-AD586JQ-AD586JQ/+-AD586JR-AD586K-AD586KN-AD586KQ-AD586KR-AD586LN-AD586LQ-AD586LR-AD586MN-AD586SQ-AD586TQ
High Precision 5 V Reference
FUNCTIONAL BLOCK DIAGRAMREV.C
High Precision
5 V Reference
FEATURES
Laser Trimmed to High Accuracy:
5.000 V 62.0mV (M Grade)
Trimmed Temperature Coefficient:ppm/8C max, 08C to +708C (M Grade)ppm/8C max, –408C to +858C (B & L Grades)ppm/8C max, –558C to +1258C (T Grade)
Low Noise, 100nV/√Hz
Noise Reduction Capability
Output Trim Capability
MIL-STD-883 Compliant Versions Available
Industrial Temperature Range SOICs Available
Output Capable of Sourcing or Sinking 10mA
PRODUCT DESCRIPTIONThe AD586 represents a major advance in the state-of-the-art in
monolithic voltage references. Using a proprietary ion-implanted
buried Zener diode and laser wafer trimming of high stability
thin-film resistors, the AD586 provides outstanding perfor-
mance at low cost.
The AD586 offers much higher performance than most otherV references. Because the AD586 uses an industry standard
pinout, many systems can be upgraded instantly with the
AD586. The buried Zener approach to reference design pro-
vides lower noise and drift than bandgap voltage references. The
AD586 offers a noise reduction pin which can be used to further
reduce the noise level generated by the buried Zener.
The AD586 is recommended for use as a reference for 8-, 10-,
12-, 14- or 16-bit D/A converters which require an external
precision reference. The device is also ideal for successive
approximation or integrating A/D converters with up to 14 bits
of accuracy and, in general, can offer better performance than
the standard on-chip references.
The AD586J, K, L and M are specified for operation from 0°C
to +70°C, the AD586A and B are specified for –40°C to +85°C
operation, and the AD586S and T are specified for –55°C to
+125°C operation. The AD586J, K, L and M are available in an
8-pin plastic DIP. The AD586J, K, L, A and B are available in
an 8-pin plastic surface mount small outline (SO) package. The
AD586J, K, L, S and T are available in an 8-pin cerdip package.
PRODUCT HIGHLIGHTSLaser trimming of both initial accuracy and temperature
coefficients results in very low errors over temperature with-
out the use of external components. The AD586M has a
maximum deviation from 5.000V of ±2.45mV between
0°C and +70°C, and the AD586T guarantees ±7.5mV
maximum total error between –55°C and +125°C.For applications requiring higher precision, an optional fine-
trim connection is provided.Any system using an industry standard pinout reference can
be upgraded instantly with the AD586.Output noise of the AD586 is very low, typically 4μV p-p. A
noise reduction pin is provided for additional noise filtering
using an external capacitor.The AD586 is available in versions compliant with MIL-
STD-883. Refer to the Analog Devices Military Products
Databook or current AD586/883B data sheet for detailed
specifications.
AD586–SPECIFICATIONS(@ TA = + 25°C, VIN = +15 V unless otherwise noted)Output Voltage Drift
Gain Adjustment
Load Regulation
NOTESMaximum output voltage drift is guaranteed for all packages and grades. Cerdip packaged parts are also 100°C production tested.Lower row shows specified performance for A and B grades.The operating temperature range is defined as the temperatures extremes at which the device will still function. Parts may deviate from their specified performance outside their
specified temperature range.
Specifications subject to change without notice.
Specifications in boldface are rested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max specifica-
tions are guaranteed, although only those shown in boldface are tested on all production units unless otherwise specified.
ABSOLUTE MAXIMUM RATINGS*VIN to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V
PowerDissipation (25°C) . . . . . . . . . . . . . . . . . . . . . 500 mW
Storage Temperature . . . . . . . . . . . . . . . . . . –65°C to +150°C
Lead Temp (Soldering,10sec) . . . . . . . . . . . . . . . . . . +300°C
Package Thermal Resistance
θJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22°C/W
θJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110°C/W
Output Protection: Output safe for indefinite short to ground or
VIN.
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in the
operational section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
CONNECTION DIAGRAM
(Top View)
AD586
THEORY OF OPERATIONThe AD586 consists of a proprietary buried Zener diode refer-
ence, an amplifier to buffer the output and several high stability
thin-film resistors as shown in the block diagram in Figure 1.
This design results in a high precision monolithic 5V output
reference with initial offset of 2.0mV or less. The temperature
compensation circuitry provides the device with a temperature
coefficient of under 2 ppm/°C.
Using the bias compensation resistor between the Zener output
and the noninverting input to the amplifier, a capacitor can be
added at the NOISE REDUCTION pin (Pin 8) to form a low-
pass filter and reduce the noise contribution of the Zener to the
circuit.
Figure 1. AD586 Functional Block Diagram
APPLYING THE AD586The AD586 is simple to use in virtually all precision reference
applications. When power is applied to Pin 2 and Pin 4 is
grounded, Pin 6 provides a 5V output. No external components
are required; the degree of desired absolute accuracy is achieved
simply by selecting the required device grade. The AD586 re-
quires less than 3mA quiescent current from an operating sup-
ply of +12V or +15V.
An external fine trim may be desired to set the output level to
exactly 5.000V (calibrated to a main system reference). System
calibration may also require a reference voltage that is slightly
different from 5.000V, for example, 5.12V for binary applica-
tions. In either case, the optional trim circuit shown in Figure 2
can offset the output by as much as 300mV, if desired, with
minimal effect on other device characteristics.
NOISE PERFORMANCE AND REDUCTIONThe noise generated by the AD586 is typically less than 4 μV
p-p over the 0.1Hz to 10Hz band. Noise in a 1MHz band-
width is approximately 200μV p-p. The dominant source of this
noise is the buried Zener which contributes approximately
100nV/√Hz. In comparison, the op amp’s contribution is negli-
gible. Figure 3 shows the 0.1Hz to 10Hz noise of a typical
AD586. The noise measurement is made with a bandpass filter
made of a 1-pole high-pass filter with a corner frequency at
0.1Hz and a 2-pole low-pass filter with a corner frequency at
12.6Hz to create a filter with a 9.922Hz bandwidth.
If further noise reduction is desired, an external capacitor may
be added between the NOISE REDUCTION pin and ground as
shown in Figure 2. This capacitor, combined with the 4kΩ RS
and the Zener resistances form a low-pass filter on the output of
the Zener cell. A 1μF capacitor will have a 3dB point at 12Hz,
and it will reduce the high frequency (to 1MHz) noise to about
160μV p-p. Figure 4 shows the 1MHz noise of a typical AD586
both with and without a 1μF capacitor.
Figure 3.0.1Hz to 10Hz Noise
Figure 4.Effect of 1μF Noise Reduction Capacitor on
Broadband Noise
TURN-ON TIMEUpon application of power (cold start), the time required for the
output voltage to reach its final value within a specified error
band is defined as the turn-on settling time. Two components
normally associated with this are: the time for the active circuits
to settle, and the time for the thermal gradients on the chip to
stabilize. Figure 5 shows the turn-on characteristics of the
Output turn-on time is modified when an external noise reduc-
tion capacitor is used. When present, this capacitor acts as an
additional load to the internal Zener diode’s current source, re-
sulting in a somewhat longer turn-on time. In the case of a 1 μF
capacitor, the initial turn-on time is approximately 400 ms to
0.01% (see Figure 5c).
Figure 5. Turn-On Characteristics
DYNAMIC PERFORMANCEThe output buffer amplifier is designed to provide the AD586
with static and dynamic load regulation superior to less com-
plete references.
Many A/D and D/A converters present transient current loads
to the reference, and poor reference response can degrade the
converter’s performance.
Figure 6 displays the characteristics of the AD586 output ampli-
fier driving a 0mA to 10mA load.
AD586Centigrade; i.e., ppm/°C. However, because of nonlinearities in
temperature characteristics which originated in standard Zener
references (such as “S” type characteristics), most manufactur-
ers have begun to use a maximum limit error band approach to
specify devices. This technique involves the measurement of the
output at three or more different temperatures to specify an out-
put voltage error band.
Figure 9 shows the typical output voltage drift for the AD586L
and illustrates the test methodology. The box in Figure 9 is
bounded on the sides by the operating temperature extremes,
and on the top and the bottom by the maximum and minimum
output voltages measured over the operating temperature range.
The slope of the diagonal drawn from the lower left to the upper
right corner of the box determines the performance grade of the
device.
Figure 9. Typical AD586L Temperature Drift
Each AD586J, K and L grade unit is tested at 0°C, +25°C and
+70°C. Each AD586SQ and TQ grade unit is tested at –55°C,
+25°C and +125°C. This approach ensures that the variations
of output voltage that occur as the temperature changes within
the specified range will be contained within a box whose diago-
nal has a slope equal to the maximum specified drift. The posi-
tion of the box on the vertical scale will change from device to
device as initial error and the shape of the curve vary. The maxi-
mum height of the box for the appropriate temperature range
and device grade is shown in Figure 10. Duplication of these
results requires a combination of high accuracy and stable tem-
perature control in a test system. Evaluation of the AD586 will
produce a curve similar to that in Figure 9, but output readings
may vary depending on the test methods and equipment utilized.
In some applications, a varying load may be both resistive and
capacitive in nature, or the load may be connected to the
AD586 by a long capacitive cable.
Figure 7 displays the output amplifier characteristics driving a
1000 pF, 0 to 10 mA load.
Figure 7a. Capacitive Load Transient Response Test Circuit
Figure 7b. Output Response with Capacitive Load
LOAD REGULATIONThe AD586 has excellent load regulation characteristics. Figure
8 shows that varying the load several mA changes the output by
a few μV. The AD586 has somewhat better load regulation per-
formance sourcing current than sinking current.
Figure 8. Typical Load Regulation Characteristics
TEMPERATURE PERFORMANCEThe AD586 is designed for precision reference applications
where temperature performance is critical. Extensive tempera-
ture testing ensures that the device’s high level of performance is
maintained over the operating temperature range.
